General Information

Event name: ZAF-22-001
Country: SOUTH AFRICA
Nature of the harmful event:
Water Discoloration , High Phyto concentration , Mass mortalities
Event directly affected:
Planktonic life
Toxicity detected: No
Associated syndrome:
Unexplained toxicity: No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: No
Event occurred before in this location: Yes
Individuals to contact: MANSFIELD, Lisa

Location & Date

[View larger map]
Location: Latitude: -32.313889, Longitude: 18.326667
General location information: Elands Bay, West Coast, West Coast, South Africa
HAB Area code(s): ZAF-01
Additional location information:
Bloom event dates (yyyy/mm/dd): Event Date:2022-03-01
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:

Microalgae

Causative organism known: Yes
Causative Species/Genus: Prorocentrum gracile ( cells/L)
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: 335mg/m3 µg/l
Additional bloom information:
Event-related bibliography: G.C. Pitcher, A. du Randt, K. G. Seanego and M. Tsanwani. Variability and controls of the ocean acidification metrics pH and pCO2 in a large embayment of an Eastern Boundary Upwelling System (EBUS). Esturine, Coastal and Shelf Science. 2023

Environmental Conditions

Weather: Turbidity (NTU): Wind direction:
Stratified water: Oxygen content (nL/L): 0.1 Wind velocity:
Temperature (°C): Oxygen saturation %: Current Direction:
Sechhi disk (m): Salinity: Current Velocity:
Nutrient information:
Temperature Range During Event: Max: °C, Min: °C
Salinity Range During Event:
Bloom location in the water column: Whole column
Growth:
In situ
Growth Comments
Additional Environmental information:

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Kit used: Type of kit used:
Additional information:
Economic losses: 450 tons of West Coast Rock Lobsters (Jasus lalandii)
Management decision:
Additional harmful effect information:
Created at 12:05 on 2 Oct 2023
Updated at 12:14 on 2 Oct 2023
IOC/UNESCO ISSHA
IOC/UNESCO ICES PICES